Answer:
Red blood cells
Explanation:
Hemoglobin carries oxygen in red blood cells
Answer:
the boy is in Kinetic energy
Explanation:
Because when he swings he isn't experiencing any forces towards him only the swing experiences potential energy
Natural Selection.
It favors the better adapted organisms.
Starvation.
Disease.
Weather.
Lack of mate.
Offspring dying.
Hunting.<span />
